"The Greens have long supported calls from medical professionals for more research and clinical trials as well as regulated access to medicinal cannabis for people such as April [Tognoni]," Ms O'Connor said.

"It's absolutely clear that medicinal cannabis has changed young April's life for the better.

"There are many similar individual stories of improved symptoms and quality of life from people who have used medicinal cannabis."

Ms O'Connor said more medical studies needed to be conducted on the medical benefits of cannabis.

"Although there is solid evidence of the medicinal and therapeutic benefits of cannabis to relieve pain and symptoms for a number of conditions, this field of study is still in its relative infancy due to the controversial and often highly politicized nature of cannabis policy," she said.

"The Greens understand that more and more scientists and clinicians are becoming interested in exploring the potential of cannabis-based medicines."